All codes are entered by pressing the yellow button before picking a truck or track. This will bring up the "enter code" screen. The "truck code" codes can only be entered at the truck selection screen.
Use the camera buttons to enter the codes. Red = 1, Orange = 2, and Yellow = 3
Enter "313" as a code
Enter: 121 (must be 2 player game)
Enter: 212
Unlock "Cliffhanger" Track
